Owners have increased staff and inventory, set up coffee stations and food giveaways and hired extra security to prepare for potential crowds and overnight campers ready to buy up to an ounce of pot, starting at 8 a.m. Wednesday.

Police are beefing up patrols and bracing for potentially rowdy crowds.

While it’s been legal in Colorado to smoke pot for the past year, Jan. 1 represents a milestone for the decades-old marijuana legalization movement. It’s the first fully legal market for selling pot.

Colorado sales will be an important test for whether legalization is a viable alternative to the drug war.